51011444311 has 4 divisors (see below), whose sum is σ = 51069611032. Its totient is φ = 50953277592.

The previous prime is 51011444303. The next prime is 51011444317. The reversal of 51011444311 is 11344411015.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51011444311 - 2³ = 51011444303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51011444317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29082045 + ... + 29083798.

It is an arithmetic number, because the mean of its divisors is an integer number (12767402758).

Almost surely, 2^51011444311 is an apocalyptic number.

51011444311 is a deficient number, since it is larger than the sum of its proper divisors (58166721).

51011444311 is an equidigital number, since it uses as much as digits as its factorization.

51011444311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58166720.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 51011444311 its reverse (11344411015), we get a palindrome (62355855326).

The spelling of 51011444311 in words is "fifty-one billion, eleven million, four hundred forty-four thousand, three hundred eleven".